-68.07% is the change from 830 to 265
Calculation steps:
[( 265 - 830 ) ÷ 830] x 100 = -68.07%
Formula
Percentage change = [(265 - 830) / 830] x 100
Subtract the new number by the original number
265 - 830 = -565
-565 ÷ 830 = -0.6807228915662651
-0.6807228915662651 x 100 = -68.07%